Treatment of waste tins



E. I. LOVEGROVE. TREATMENT 0F WASTE TINS.

APPLICATION FILED AUG9, 1917.l

Patented DB0. 28,1920.

TREATEMEIQ'T OF "W'ASTE TENS.

To all 1li/wm it eno/y col/eeen Be it nknown that il. lnwn? JAMESLoveonovn, u subject of the .King el England, re- Siding;- in London?nlngla'inl, lime iiiivenied certain new and use' i linprovemenis in theTieliment oi? Wiiee Tins, of which iie Jiollmving is u speei'ieeion. Thepresent inveiiii'in comprises the conibino'tion with 'zlie misa'eonclni; lie- .ionging to any furnace, n n' inslzince to ndnsec'ies'rnetoi' or to e, steam generator, of n chamber sep-arme Llroinille sei-Il inmune and employed to receive Lilo waste tins? ineens fordiverting e portion or the whole of tile Weste eonilnisiowgnses fromaile seid conduit to conse tile/in lo hein, the elinni loer whendesired, iin-l menne for collecting the Solder melted from tile eine.

The saicl Waste combustion-gases :ire foreierfilily conseil to Howthrough 'olie clirimlier o effect the heating thereof.

The present invention comprises also ille coi'nbinntion 'with thewaste-gases conduit belonging to any furnace of the chamber for Henningwaste tins iliei is constructed sui)- Stnniinlly as hereinafterdescribed.

in 'the ordinary method of recovering` solder from Weste tins, thesoldered tins in-ey seperated *from ocliers nml are placed in o furnacelienleil wiel] collieT oil, or other ffnel or binfoeil `in un open firewith Wood slizivings or other combustible materiel. This latter isignited and lie Solder is melted oil? the eine und collecteil with nConsiderable znxionnt of dross. The nnsoldered tins also :ire burned iorid them of tin and various :nllieringdeposited matter, the processordinarily adopted being to burn them in o, furnace or open lire withwood orotlier con'ibnsilile nnneiial either before or after ille/y erebilled.

li, was found, lion'eifeiny il'int the process reenlsed in wnstn 'eowing lo a considerable ernennt oi dross n ing' formell with the solder:ind undue expenclilnre in respect of Sorting, handling, nml burning.und in the making of sepznntc lires for enols lmacli of solilerefl ornnsolilereil tins.

iieeorilingly the present invention ilus ior its object the 'rentn'ienloi" wzi'sie ins ily means oi Weste heel from :my inrmlee, e. y. from themiste gus conflnil through which the eombustiongeses poes on their Way'of the chamber.

iPei-*Ju'einteri Bee. @Se isi?. serial. ne. 155.1376.

from the furnace of o steaimlioiler or o refuse-destructor toward 'thechimney. Due to the inet that excess of oxvgen is eil to the combustionchambers og steam boilers or refuse (lestrneizors, oxygen is present inthe produces of combustion.

According lo the present invention, the 6U clmnilier in which ilie Westetins are tren-'ted is arranged adjacent the wnsLe-ens oon fluitYaforesaid and is provided. niitli two passages communicating therewithso *that 1i', een be heated by passing he waste 65 or o portion thereof?'through it; snioble dempers or vnlv "leere provided on the eonnectingpassages to slint oil 'ifne cli-millier7 or lo flive, 'ille requiredanionni oi Weste gases intoit when reino ,il 7o will lie appreciatedlli-ir exne le sign and construction of ille chamber will e Variedaccording o lie special eiifenznsonees o' any particular euse; llie drowings liereoimnexefl illustrate one psi lar ooneirnction which is by nos;o' exnnple.

.ln iliese [inw/inL Figure l is i vertical secion on lle line i-1 oiFig. 2, en

`Fig. is :i vertical secion on 'die line 2--2 of l, incl F 3 is ndingrnnlroei-iey allowing' slim-i; 'the course of jalie lne gasesthrough the params,

Like reference characters indicate like parts in both the ignres.

The chamber has Walls A1 A2 built ol: any snimble lient-resistingmaiiei.

li desired, a firepioof iining A niej] lie 90 provided on the interiorto protect the Wells The chamber is arm ff. With its top on a level withthe tipping: plz forni l, a suitable opening B1 to provieiecommunication Willi lle chamber being fitted wit-l1 removable cover, notshown in,4 the (lrmvings.

This clmmber is constructed adjacent the :line of the stemnlboiler orother Wasi@ gils conduit nforesei and e passage D in ille lo@ wall A2 isarranged to con'nnnnieate with such flue or other n'nstegns conduit. Thepassage l) opens into die oli-amber A near The top :unl is providedwilli a nlve or damper D1. Any type of demper may be loo used and inthat illnstrete o plaie l ie -ohamber is closed.

pivotally mounted to swing across, and close, the end of the passage l),being operated by a suitable handle D2 which is accessible inv the mouthB1 of the chamber.

The bottoni of the 'chamber A has coinmunication, hy a passage E, withanother part of the lue or-Waste-gas conduit at point nearer to theoutlet troni the saine than is the point at which the passage Dcoinrnunieates with Vthe saine flue, so that the passage D, chamber Aand passage E constitnte a hypass to a portion of the main Adue. Asuitable damper El, With a controlling handle E2, controls the passageE,

The function of the passages @and E and the valves or dempers DI El isto permit the het from the line or Waste-gas con duit aforesaid toflou/through the chamber A, or to shuttheni off from the chaniher may herequired.

A suitable F is provided in the chamber A and beneath it tivobathe-plates (it G1 are provided. These plates extend the full ivi Y hof' the chamber as shown in Fig. 2, and slope downward toward thecenter, as shown in TEig. l, but they are so di niensioned as to leave aspace G2 between their lower edges. The due gases entering; hy 'thepassage l) pass (lownward through the space (i2 and leave hy' thepassage ll.

Beneath this space G2 there is .mounted a removable trough lil which iscarried on suitable guides H1. T he trough. can be removed through anopening H2 in the Wall oi the chamber (see lig. Q)'.,f'and, iii de sireda cover H3 may he provided for this aperture.,

A door d is fitted in the Wall A1 or the chamber to provide means forremoving the tins after they have been treated in it. Any suitableconstruction of door inay he used, but it Wili be appreciated. that itshould oe such as will withstand the heat' to which the chamber issubjected.

The method or' using this chamber is follows The Waste tins are droppedinto the charnber A through the open ing- B1 on the tippingA platform B.rthere is no need. to separate the soldered tins from the unsolderedtins as has heretofore been the case. Vhile the chamber is being filled,the dempers El and El are -both so positioned as to close the passages Dand E respectively.

lVhen'the chamber is filled, the passages D and E are opened and thetop'lilL or' the The hot `@gases from the Waste-gas conduit or .fluethen enter by the passage D and pass downward through the chamberApthroueh the space G2 and out by the passage E to the flue. Thetemperature or' these 'gases is suliicient to free the` tins of anyadheringd deposited matter and to melt the solder which drains ofi' themand, passing downward through the grate F,

falls into the trough lll or on to the bahes G G1 andthenoe into thetrough H.

As soon the (le-soldering and burning process is completed, the fluegases are shut oit by operating the danipers D1 and E1v as further heatis required. The tins are then removed from the chamber through theopening provided by the door J and their further treatment is the saineas has hitherto been the ordinary practice. That is to say the tins havebeen sufficiently burned to destroy the coating of tin so that 'this nolonger interferes with the subse quent use of the steel which `may thenbe pressed and baled ready tor removal to steel rc'orlrs or other Worksfor utilization.

The matter' adhering to the tins which has heen burnt oil', causes thepresence of a certain amount of dross, and when the tins are reinovedfrom the furnace, the dross h. falls oii them when they are with- Widrawn through the door J, is collected as it contains a certain amountof solder.

The solder collected in the trough H has a certain arnount of drossmixed with it, and in order to reduce this to a minimum, the trough H iswithdrawn during the lilling and ei'nptying of the ehainber and aseparate 'trough is inserted in its place. The second troufgh catchesany debris from the tins which would otherwise collect in the bottoni oithe chamber A and in the flue E. By using a separate trough, this debrisis lrept separate from the solder collected 'while the chamber is inoperation.

llllhile a particular construction of chamber for treating tins has beendescribed and illustrated, it will be apprefiiated that the precisedetails of construction may he vato suit any particular circumstanceswithout departing from the spirit of the invention set 'forth in theappended claims.

lt will loe appreciated that this chamber oiliers several advantagesover other devices 'used "for burning and recovering solder from 'wastetins. ln the irst place the trouble and cost of independently-firedfurnaces isentirely ohviatod sinceithe only source of heat used is theflue gases from the Wastepgas conduit or flue. There is no need to sortout the unsoldered tins before treating them iu this furnace, theprocess of de-soldering; and burning off the tins being per- Forineiilin one operation, and the cost ofworiring thereby reduced. Finally, theWaste of solder and cost of refining same is very much reduced'.

lt has before been proposed to treat vWaste tins vin a chamber providedWith perforated Walls and situated in the inain Hue ot' adustdestructol' so that a portion of the {lue-gases passes through it.lt will be seen that the present invention offers several'advantagesover the construction previously proposed since the chamber for the tinsdoes not oder will any obstruction to the free How of the gases `throughthe main flue, andmoreover, can' be shut oif entirely from theflue-gases during the process of illing and emptying, and also when itis not required to be used.

What I claim as my invention and desire to secure by Letters Patentis 1. Apparatus of the character described including in combination, acontainer adapted to immovably hold a charge of -Waste tins, means' toconduct flue gases from a furnace to the container and through thecharge, said gases containing oxygen, means for controlling the flow ofsaid gases through the charge, and means to collect the materials meltedfrom the tin.

A 2. Apparatus of the character described including v in combination,` acontainer adapted to immovably hold a charge of Waste tins, means toby-pass the products of combustion from a furnace through the chargesaid products of combustion containdeposited thereon, consisting in,charging the tin in a fire-proof container, ley-passing hot Hue gasescontaining oxygen through the tins, collecting the melted solder,shutting off the low. of gases to the tins, removing the ycollectedsolder, and subsequently removing the cleaned tins.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

EDWIN JAMES LOVEGROVE. lWitnesses:

HAROLD WADE,

HARRY S. BRIDGE.

